With reciprocal verbs, there are two or more subjects which are acting on each other.

Finally, Russian contains a set of reciprocal pronouns corresponding to English ‘each other’.

While our data supports the traditional view of each other as the primary and most common reciprocal construction in English, we find a greater degree of variation in construction types than this traditional view might suggest.

Navigators in the open sea normally alter course in this way because they believe there is another vessel dead ahead on a reciprocal course or on their port bow in circumstances which require an alteration to starboard.

I explained to him that I needed to turn around and fly a reciprocal course to re-establish communication with a soldier in distress.

reciprocally

The energy of attraction between opposite charges is reciprocally related to the distance between the charges.

In any case, can a German feel European unilaterally, without the Portuguese (for example) similarly and reciprocally feeling European rather than Portuguese?

For some critics Peer review is a pale shadow of African heads of states' real promise: to criticise each other reciprocally and to exercise peer pressure in order to gain democracy and respect for human rights.